Take-up mechanism



Ju y 1929- J. A. FIRSCHING TAKE-UP MECHANISM Filed Sept. 29, 1925 Patented July 2, 1929.

UNITED STATES JOSEPH A. museums, or UII CA, new YORK.

TAKE-UP MECHANISM.

Application filed September 29, 1925.

This invention relates to certain improve ments in take-up mechanism for springneedle knitting macl'iines.

The main object of the invention is to produce a machine in which the take-up mechanism will provide a substantially uniform tension upon the whole circumference of the tubular fabric as it leaves the needles of the machine, whereby difliculty and trouble in the operation of knitting is avoided, and an improved fabric is produced. It is found that with this machine substan tially perfect knitting results are obtained, and that fabric can be knitted even from properly conditioned celanese yarn, altho it is understood that heretofore such yarn was incapable of being practically knitted on a spring needle machine.

Other objects and advantages relate to the details of the structure, all as will more fully appear from the following description, taken in connection with the accompanying drawings in which:-

Figure 1 is a. front elevation of a portion of a machine embodying this invention.

Figure 2is a section on line 2-2, Figure 1.

The general form of the take-up mechanism here shown is that now in common use and comprises a frame 1. rotatably carried from a. bearing 2, rotation being imparted to the frame by the tubular fabric as it is carried around by the knitting ma chine all in a manner well known and in general use in the art. The bearing 2 is formed with a gear 3 transmitting motion to a second bevel gear 4 for driving shaft 5 and this shaft 5 is formed with a pulley 6 adapted to be equipped with a belt 7 for driving pulley 8 mounted upon the shaft of the takeup roll 9 for the tubular fabric.

In addition, theshaft 5 is formed with. an eccentric or crank 10 upon which crankarm the pitman 11 is mounted, and which pitman is provided at its lower end with a pivoted pawl 12 for intermittently actuating the ratchet 13, all in. the usual manner. The ratchet 13 is mounted upon the shaft 14 which drives the take-up roll 15. A third take-up roll 16 is mounted below the pressure roll and is free to rotate in hearings in the frame 1 and cooperating gears 17 and 18 are mounted upon the respective shafts which carry the rolls 15 and 16 for transferring motion positively from the ratchet 13 to both of the rolls simultaneously Serial No. 59,432.

and at equal speeds. Th two take-up rolls 15 and 16 preferably include a. covering of roughened or sanded cloth, and are the rolls which maintain the tension upon the fabric as it comes from the needles of a springknitting machine, and heretofore it has been customary to depend wholly upon friction for rotating the roll 16 as the fabric is drawn between the rolls by and wound upon the take-up roll 9. i

The tubular fabric as it comes from the needles of the machine passes around the spreader ring 19 between the two rods 20 and 21 over the rod 22 upwardly around the roll 16 between the two take-up rollers 15 and 16, then around the roll 15 and between the roll 15 and the idler 23, and upwardly around the take-up roll 9 upon which it is wound in a suitable cylindrical roll.

When the roll 15, as in. the present ma chine, is positively driven and the roll 16 is in effect a mere idler, and relies for any rotary motion upon the movement of the fabric, considerable tension is applied to the side of the flattened tubular fabric in contact with the positively driven pressure roll 15, while the opposite side of the tubular fabric as it passes between the take-up rollers has very little tension, and as a result, the tension of the fabric at the needles, and as it leaves the needles, is different at different portions of the circumference of the machine, and results in a non-uniform knitting.

As opposed to this, it is found that when the roller 16 is positively driven simultaneously with and at the same speed as the roler 15, uniform tension is applied to the fabric throughout its circumference, and uniform and effective knitting results, and an improved fabric is produced.

Altho I have shown and described a specific construction of apparatus, I do not desire to restrict myself to the details of the same, as various changes may be made within the scope of the appended claim.

I claim:

A knitting machine comprising a bearing, a gear element stationary with the bearing, a frame rotatable with respect to the hearing, a shaft mounted on the frame, a gear on the shaft meshing with said gear element, a pair of take-up rollers mounted on said frame and adapted to maintain tension on the fabric during knitting, means on said frame, a pulley on said shaft and a belt connecting the said pulley to the roll for driving the latter.

In witness whereof I have hereunto set my hand this 19th day of September, 1925.

JOSEPH A. FIRSCHING. 

